BESTIANA, Y. 2014. USING MODIFIED GAMEJEOPARDY! AND HOP-SCOTCH TO IMPROVE ENGLISH VOCABULARY MASTERY OF SEVENTH GRADERS IN SMP NEGERI 1 BONDOWOSO. Retain: Journal of Research in English Language Teaching. 2, 1 (Feb. 2014). DOI:https://doi.org/10.26740/rt.v2i1.7061.